// Allison Obourn, CSE 142
// Prompts the user with addition puzzles comprised of 
// 2 - 5 operands until the user gets 3 wrong.

import java.util.*;

public class AdditionGame {
	public static void main(String[] args) {
		Scanner console = new Scanner(System.in);
		Random rand = new Random();

		int points = 0;
		int wrong = 0;
		
		while (wrong < 3) {
			int score = playRound(console, rand);
			points += score;
			if (score == 0) {
				wrong++;
			}
		}
		System.out.println("Points: " + points);
	}
	
	// creates an equation and prompts the user for a soultion
	// returns 1 if the user answers correctly and 0 otherwise
	public static int playRound(Scanner console, Random rand) {
		int operands = rand.nextInt(4) + 2;
		int value = rand.nextInt(10) + 1;
		System.out.print(value);
		int sum = value;
		for (int i = 1; i < operands; i++) {
			value = rand.nextInt(10) + 1;
			System.out.print(" + " + value);
			sum += value;
		}
		System.out.print(" = ");
		int guess = console.nextInt();
	
		if (sum == guess) {
			return 1;
		} else {
			System.out.println("Wrong! The answer was " + sum);
			return 0;
		}
	}
}